ceph/src/dpdk/lib/librte_lpm/rte_lpm6.h

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33 #ifndef _RTE_LPM6_H_
  34 #define _RTE_LPM6_H_
  35
  36 /**
  37  * @file
  38  * RTE Longest Prefix Match for IPv6 (LPM6)
  39  */
  40
  41 #include <stdint.h>
  42
  43 #ifdef __cplusplus
  44 extern "C" {
  45 #endif
  46
  47
  48 #define RTE_LPM6_MAX_DEPTH               128
  49 #define RTE_LPM6_IPV6_ADDR_SIZE           16
  50 /** Max number of characters in LPM name. */
  51 #define RTE_LPM6_NAMESIZE                 32
  52
  53 /** LPM structure. */
  54 struct rte_lpm6;
  55
  56 /** LPM configuration structure. */
  57 struct rte_lpm6_config {
  58         uint32_t max_rules;      /**< Max number of rules. */
  59         uint32_t number_tbl8s;   /**< Number of tbl8s to allocate. */
  60         int flags;               /**< This field is currently unused. */
  61 };
  62
  63 /**
  64  * Create an LPM object.
  65  *
  66  * @param name
  67  *   LPM object name
  68  * @param socket_id
  69  *   NUMA socket ID for LPM table memory allocation
  70  * @param config
  71  *   Structure containing the configuration
  72  * @return
  73  *   Handle to LPM object on success, NULL otherwise with rte_errno set
  74  *   to an appropriate values. Possible rte_errno values include:
  75  *    - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
  76  *    - E_RTE_SECONDARY - function was called from a secondary process instance
  77  *    - EINVAL - invalid parameter passed to function
  78  *    - ENOSPC - the maximum number of memzones has already been allocated
  79  *    - EEXIST - a memzone with the same name already exists
  80  *    - ENOMEM - no appropriate memory area found in which to create memzone
  81  */
  82 struct rte_lpm6 *
  83 rte_lpm6_create(const char *name, int socket_id,
  84                 const struct rte_lpm6_config *config);
  85
  86 /**
  87  * Find an existing LPM object and return a pointer to it.
  88  *
  89  * @param name
  90  *   Name of the lpm object as passed to rte_lpm6_create()
  91  * @return
  92  *   Pointer to lpm object or NULL if object not found with rte_errno
  93  *   set appropriately. Possible rte_errno values include:
  94  *    - ENOENT - required entry not available to return.
  95  */
  96 struct rte_lpm6 *
  97 rte_lpm6_find_existing(const char *name);
  98
  99 /**
 100  * Free an LPM object.
 101  *
 102  * @param lpm
 103  *   LPM object handle
 104  * @return
 105  *   None
 106  */
 107 void
 108 rte_lpm6_free(struct rte_lpm6 *lpm);
 109
 110 /**
 111  * Add a rule to the LPM table.
 112  *
 113  * @param lpm
 114  *   LPM object handle
 115  * @param ip
 116  *   IP of the rule to be added to the LPM table
 117  * @param depth
 118  *   Depth of the rule to be added to the LPM table
 119  * @param next_hop
 120  *   Next hop of the rule to be added to the LPM table
 121  * @return
 122  *   0 on success, negative value otherwise
 123  */
 124 int
 125 rte_lpm6_add(struct rte_lpm6 *lpm, uint8_t *ip, uint8_t depth,
 126                 uint8_t next_hop);
 127
 128 /**
 129  * Check if a rule is present in the LPM table,
 130  * and provide its next hop if it is.
 131  *
 132  * @param lpm
 133  *   LPM object handle
 134  * @param ip
 135  *   IP of the rule to be searched
 136  * @param depth
 137  *   Depth of the rule to searched
 138  * @param next_hop
 139  *   Next hop of the rule (valid only if it is found)
 140  * @return
 141  *   1 if the rule exists, 0 if it does not, a negative value on failure
 142  */
 143 int
 144 rte_lpm6_is_rule_present(struct rte_lpm6 *lpm, uint8_t *ip, uint8_t depth,
 145 uint8_t *next_hop);
 146
 147 /**
 148  * Delete a rule from the LPM table.
 149  *
 150  * @param lpm
 151  *   LPM object handle
 152  * @param ip
 153  *   IP of the rule to be deleted from the LPM table
 154  * @param depth
 155  *   Depth of the rule to be deleted from the LPM table
 156  * @return
 157  *   0 on success, negative value otherwise
 158  */
 159 int
 160 rte_lpm6_delete(struct rte_lpm6 *lpm, uint8_t *ip, uint8_t depth);
 161
 162 /**
 163  * Delete a rule from the LPM table.
 164  *
 165  * @param lpm
 166  *   LPM object handle
 167  * @param ips
 168  *   Array of IPs to be deleted from the LPM table
 169  * @param depths
 170  *   Array of depths of the rules to be deleted from the LPM table
 171  * @param n
 172  *   Number of rules to be deleted from the LPM table
 173  * @return
 174  *   0 on success, negative value otherwise.
 175  */
 176 int
 177 rte_lpm6_delete_bulk_func(struct rte_lpm6 *lpm,
 178                 uint8_t ips[][RTE_LPM6_IPV6_ADDR_SIZE], uint8_t *depths, unsigned n);
 179
 180 /**
 181  * Delete all rules from the LPM table.
 182  *
 183  * @param lpm
 184  *   LPM object handle
 185  */
 186 void
 187 rte_lpm6_delete_all(struct rte_lpm6 *lpm);
 188
 189 /**
 190  * Lookup an IP into the LPM table.
 191  *
 192  * @param lpm
 193  *   LPM object handle
 194  * @param ip
 195  *   IP to be looked up in the LPM table
 196  * @param next_hop
 197  *   Next hop of the most specific rule found for IP (valid on lookup hit only)
 198  * @return
 199  *   -EINVAL for incorrect arguments, -ENOENT on lookup miss, 0 on lookup hit
 200  */
 201 int
 202 rte_lpm6_lookup(const struct rte_lpm6 *lpm, uint8_t *ip, uint8_t *next_hop);
 203
 204 /**
 205  * Lookup multiple IP addresses in an LPM table.
 206  *
 207  * @param lpm
 208  *   LPM object handle
 209  * @param ips
 210  *   Array of IPs to be looked up in the LPM table
 211  * @param next_hops
 212  *   Next hop of the most specific rule found for IP (valid on lookup hit only).
 213  *   This is an array of two byte values. The next hop will be stored on
 214  *   each position on success; otherwise the position will be set to -1.
 215  * @param n
 216  *   Number of elements in ips (and next_hops) array to lookup.
 217  *  @return
 218  *   -EINVAL for incorrect arguments, otherwise 0
 219  */
 220 int
 221 rte_lpm6_lookup_bulk_func(const struct rte_lpm6 *lpm,
 222                 uint8_t ips[][RTE_LPM6_IPV6_ADDR_SIZE],
 223                 int16_t * next_hops, unsigned n);
 224
 225 #ifdef __cplusplus
 226 }
 227 #endif
 228
 229 #endif